package com.tianji.learning.mq;

import com.tianji.api.dto.trade.OrderBasicDTO;
import com.tianji.common.constants.MqConstants;
import com.tianji.common.utils.CollUtils;
import com.tianji.learning.service.ILearningLessonService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * @Description LessonChangeListener
 * @Author zhd
 * @Date 2024-12-07
 */

@Slf4j
@Component
@RequiredArgsConstructor
public class LessonChangeListener {
	private final ILearningLessonService lessonService;

	/**
	 * 监听订单支付或课程报名的消息
	 * @param order 订单信息
	 */
	@RabbitListener(bindings = @QueueBinding(
			value = @Queue(value = "learning.lesson.pay.queue", durable = "true"),
			exchange = @Exchange(name = MqConstants.Exchange.ORDER_EXCHANGE, type = ExchangeTypes.TOPIC),
			key = MqConstants.Key.ORDER_PAY_KEY
	))
	public void listenLessonPay(OrderBasicDTO order){
		// 1.健壮性处理
		if(order == null || order.getUserId() == null || CollUtils.isEmpty(order.getCourseIds())){
			// 数据有误，无需处理
			log.error("接收到MQ消息有误，订单数据为空");
			return;
		}
		// 2.添加课程
		log.debug("监听到用户{}的订单{}，需要添加课程{}到课表中", order.getUserId(), order.getOrderId(), order.getCourseIds());
		lessonService.addUserLessons(order.getUserId(), order.getCourseIds());
	}
}
